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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Additional Information (Detail) - USD ($) | 12 Months Ended
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Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2015
Summary Of Significant Accounting Policies [Line Items] |  |  |
Minimum protective endowment related to continuing operation in Pennsylvania | $ 500,000 |  |
Reserves related to uncollectible accounts and refunds | 44,800,000 | $ 64,500,000 |
Net balance of capitalized software development costs | $ 11,800,000 | $ 18,300,000 |
Anti-dilutive shares excluded from computations of earnings per share | 1,682,000 | 2,803,000 | 1,189,000
Cumulative translation losses | $ 59,400,000 | $ 42,600,000 |
Advertising expense | 209,900,000 | 227,200,000 | $ 264,200,000
Impairment of Leasehold | 8,000,000 | 13,700,000 | 4,300,000
Provisions For Refund Payments | 47,200,000 | 46,500,000 | 42,300,000
Federal Trade Commission Settlement Agreement [Member] |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Allowance for Doubtful Accounts Receivable, Write-offs | 24,200,000 |  |
Noncontrolling Interest |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Cumulative translation losses | 1,300,000 | 900,000 |
Educational Services |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Provision for Doubtful Accounts | $ 40,300,000 | 35,500,000 | $ 47,600,000
Perkins Student Loan Fund |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Percentage of Contributions | 33.00% |  |
Allowances for expected losses on loan collections | $ 2,600,000 | 2,600,000 |
Minimum |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Equity Method Investment, Ownership Percentage | 20.00% |  |
Finite Lived Intangible Asset Useful Life | 1 year |  |
Maximum |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Equity Method Investment, Ownership Percentage | 50.00% |  |
Finite Lived Intangible Asset Useful Life | 18 years |  |
Buildings and Leasehold Improvements | Minimum |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Property, Plant and Equipment, Useful Life | 5 years |  |
Buildings and Leasehold Improvements | Maximum |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Property, Plant and Equipment, Useful Life | 40 years |  |
Computer, Furniture and Equipment | Minimum |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Property, Plant and Equipment, Useful Life | 3 years |  |
Computer, Furniture and Equipment | Maximum |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Property, Plant and Equipment, Useful Life | 8 years |  |
Adtalem Brazil |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Ownership interest of parent in subsidiary | 2.10% |  |
Adtalem Global Education Inc. |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Ownership interest of parent in subsidiary | 97.90% |  |
Cumulative translation losses | $ 58,100,000 | 41,700,000 |
Available-for-sale Securities, Accumulated Gross Unrealized Gain (Loss), before Tax, Total | 300,000 | 100,000 |
Tax effect on unrealized gains on available-for-sale securities | $ 200,000 | $ 100,000 |

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